Redeeming vouchers

You have a download coupon with an eight-digit code number which consists only of digits?

You have a yellow/black voucher from cardboard of the unsicht-Bar Berlin or the unsicht-Bar Hamburg?

You have a brown cardboard voucher with the inscription "Dunkelrestaurant Hamburg" or "Dunkelrestaurant Berlin"?

You have a valid voucher issued by the dark restaurant "Nocti Vagus" in Berlin?